How Do I Tackle Conceptual Physics Problems as a Beginner?

AI Thread Summary
Beginner students often struggle with conceptual physics problems, particularly when they lack prior experience. It's recommended to focus on one specific question to facilitate targeted help from others. Engaging with the material and demonstrating an attempt at understanding is crucial for receiving meaningful assistance. Avoid overwhelming the forum with multiple questions at once to maintain clarity and effectiveness in discussions. Seeking guidance in a structured manner can enhance learning and problem-solving skills in physics.
eqreal
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Hi there, I've just joined the university for the 2nd week now. My lecturer has gave this homework which i have no idea to solve at all... It is not calculation but conceptual problems. Can anyone please guide me or help me with it? I'll truly appreciate and thanking you so much! Please help T_T
 

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eqreal said:
Hi there, I've just joined the university for the 2nd week now. My lecturer has gave this homework which i have no idea to solve at all... It is not calculation but conceptual problems. Can anyone please guide me or help me with it? I'll truly appreciate and thanking you so much! Please help T_T

Pick a question, just one question please, and write it as a post we can read. Attaching documents is not going to work. You've got a forum where you can write stuff, and that is what we will read. I did look at your sheet, and it is just a list of lots of questions. Pick ONE, and ask about it. Show that you have at least made an attempt at thinking about it for yourself. That's the minimum required for us to help you further.

If you get some useful input, then you might pick another one. (Please don't just start 14 new threads!)

Cheers -- sylas
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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